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As any admin knows, OS upgrades can be painful. Despite the best intentions and efforts by the vendor, bad things happen. This is especially true with kernel upgrades. It’s one thing to run a blanket “yum update” or “apt-get upgrade” on your average Linux desktop, but even the tamest patch can ascend to truly ulcer-inducing levels when it applies to a critical system that can ill afford any extended downtime.[Read More…]